multi arch builds

Author: robbavey

.travis.yml

@@ -7,9 +7,10 @@ before_install:
   - sudo apt-get install libseccomp-dev
 arch:
   - arm64
+  - amd64
 
 env:
   jobs:
     - ELASTIC_STACK_VERSION=7.x
     - SNAPSHOT=true ELASTIC_STACK_VERSION=8.0.0-SNAPSHOT
-    - SNAPSHOT=true ELASTIC_STACK_VERSION=7.11.0-SNAPSHOT
+    - SNAPSHOT=true ELASTIC_STACK_VERSION=7.11.0-SNAPSHOT